The brown rooftop antenna feeds look to be coming from the top metal conduit, as it passes over the lower one. However, the Virgin cable enters & exits the lower conduit, so there is a possibility the one cut off is actually a feed to the upper flat & is seperate from yours.
My money is on the lower conduit being the Virgin feeds.
As a Very Insightful Person, I'm here to share my knowledge. I don't work for Virgin Media.
It's possible that your feed comes from a wall mounted box somewhere on the block of flats which would explain why the drop cable is coming from above.
When an apartment building is pre-wired the lockbox, which is basically a coax splitter, is usually mounted above the floor adjacent to the incoming duct feed on the ground floor. Larger buildings may have secondary lockboxes every 2-3 floors. However many lockboxes there are the drop cabling to the individual flats is inside the building.